CN2172196Y

CN2172196Y - Welder hot air electrical heater for making plastic tarpaulin

Info

Publication number: CN2172196Y
Application number: CN 93231838
Authority: CN
Inventors: 李福玉
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-09-14
Filing date: 1993-09-14
Publication date: 1994-07-20
Anticipated expiration: 2003-09-14

Abstract

The utility model relates to a welder hot air electrical heater for making plastic tarpaulins, which is composed of a tube body 1, a left end head 2, a right end head 3, an electric heating wire 8, etc., wherein, the tube body 1 and the end heads 2, 3 of the utility model are all made of the ceramic material; the cross-sections of the tube 1 and the end heads 2, 3 are provided with at least two trapezoidal electric heating wire holes 9 which are around the center of a circle and are penetrated. The utility model has good ventilation, quick heat radiation, high thermal efficiency, high insulation property and particularly obviously reduced exploding rate of a ceramic. The utility model is a hot air electrical heating tube with good quality, high efficiency and long service life.

Description

Welder hot air electrical heater for making plastic tarpaulin

The utility model relates to fluid heater; The hot blast electric heater that particularly relates to a kind of plastics paulin welding machine.

The hot blast electric heater is the important process spare part of plastics paulin welding procedure.Its basic structure and operation principle are by to the porcelain tube inner high voltage blowing that heating wire is housed, and the hot blast that obtains output carries out the welding of plastics paulin.At present, the hot blast electric heater that domestic manufacturer is used, majority are the import product that consume a large amount of foreign exchanges, and minority then adopts home products.Its common defects is that it is too low to influence service life because of perfect not to the utmost on material and the structure.For example, porcelain tube occurring in heating and welding process bursts; Or the high-pressure blast in the input electric heater sneaks into oil or moisture content unavoidably and causes short circuit, directly influences the effect or the quality of paulin welding.

The purpose of this utility model is at existing hot blast electric heater, because short circuit and burst the rate height and the low present situation of Shou Pinte provides a kind of ventilation well, rapid heat dissipation, thermal efficiency height, insulating properties is strong, particularly can significantly reduce the high-quality that short circuit and porcelain tube burst rate, efficient, long-lived hot blast electrothermal tube.

The purpose of this utility model is to realize by following embodiment:

According to thinking of the inventor, the existing electric heater life-span is short, short circuit and the high reason of the rate that bursts, and the one, the porcelain tube material capability is limit, and bursts easily under the temperature surge conditions; The 2nd, the heating wire hole of porcelain tube all is a circular hole, and the heating wire that is assembled in the circular hole must sink on the bottom surface of circular hole, and high-pressure blast is brought oil in the circular hole or moisture content under the guiding of circular hole, directly is attached on the heating wire of circular hole bottom surface to cause short circuit.For this reason, the inventor changes porcelain tube into ceramic material on the one hand; Then the heating wire hole of earthenware is changed into trapezoidal hole on the other hand.This change makes heating wire by the center of support at trapezoidal hole, and oil in the high-pressure blast or moisture content leave then that heating wire is concentrated respectively and attached to four wedge angles of trapezoidal hole, avoided the short circuit of heating wire.Because the change to porcelain tube material and hole shape has reduced bursting of earthenware significantly.

Accompanying drawing 1a is that of the present utility model facing partly cutd open figure.

Accompanying drawing 1b is a right view of the present utility model.

Below be specifying:,, ceramic termination 2, a left side and right ceramic termination 3 are fastened on the two ends of body 1 by high temperature resistant, oxidation resistant bolt 4 at the center of ceramic body 1 to accompanying drawing.The section of body 1 and termination 2.3, the trapezoidal heating wire hole 9 that has at least two rings to run through around the center of circle.In the outside of left end head 2, the patchboard 5 of micarex or pottery is housed, 6,2～3 plugs 7 of heating wire pigtail splice respectively.Heating wire 8 is assembled in the trapezoidal hole 9 of ceramic body 1.Above-mentioned patchboard 5 can omit, and directly heating wire is drawn with terminal screw or plug from the left end head to connect.

The utility model can be made the series of products of all size according to technological requirement.For example: ∮ 47 * 150mm three-phase (or single-phase) 380V, 220V, 2.5KW, 3.5KKW, ∮ 35 * 180mm, single-phase 220V, 2.0KW, ∮ 47 * 310mm, single-phase 220V, 4.5KW.

Claims

1, a kind of plastics paulin welding machine hot blast electric heater, by body [1], left and right termination [2], [3], heating wire compositions such as [8]; It is characterized in that:

[1]. make by ceramic material body 1 and termination, the left and right sides [2];

[2]. on the section of body [1] and termination [2], [3], the trapezoidal heating wire hole [9] that has at least two rings to run through around the center of circle.